本文介绍了DataGridColumnHeader ContextMenu以编程方式的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我在View.cs中有这个代码
I have this code in View.cs
var contextMenu = this.dataGridFacade.GiveContextMenuForDataGrid(this.DataGridAllJobs);
this.DataGridAllJobs.ContextMenu = contextMenu;
但是我想为标题添加这个上下文菜单。可以吗?
But I want to add this context menu for header only. Is it possible?
推荐答案
你只需要检索并设置其ContextMenu。
You just have to retrieve the DataGridColumnHeadersPresenter of your DataGrid and set its ContextMenu.
var contextMenu = this.dataGridFacade.GiveContextMenuForDataGrid(this.DataGridAllJobs);
var columnHeadersPresenter = this.DataGridAllJobs.SafeFindDescendant<DataGridColumnHeadersPresenter>(ip => ip.Name == "PART_ColumnHeadersPresenter");
if (columnHeadersPresenter != null)
{
columnHeadersPresenter.ContextMenu = contextMenu;
}
这里是SafeFindDescendant扩展方法:
And here is the SafeFindDescendant extension method :
public static class Visual_ExtensionMethods
{
/// <summary>
/// Retrieves the first Descendant of the currren Visual in the VisualTree matching the given predicate
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="this">The current Visual.</param>
/// <param name="predicate">An optional predicate that the descendant have to satisfy.</param>
/// <returns></returns>
public static T SafeFindDescendant<T>(this Visual @this, Predicate<T> predicate = null) where T : Visual
{
T result = null;
if (@this == null)
{
return null;
}
// iterate on VisualTree children thanks to VisualTreeHelper
int childrenCount = VisualTreeHelper.GetChildrenCount(@this);
for (int i = 0; i < childrenCount; i++)
{
var currentChild = VisualTreeHelper.GetChild(@this, i);
var typedChild = currentChild as T;
if (typedChild == null)
{
// recursive search
result = ((Visual)currentChild).SafeFindDescendant<T>(predicate);
if (result != null)
{
break;
}
}
else
{
if (predicate == null || predicate(typedChild))
{
result = typedChild;
break;
}
}
}
return result;
}
}
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